City of Sheboygan's Derek Munch plows snow along an North 8th Street sidewalk, Monday, April 16, 2018 in Sheboygan, Wis. Munch said that the snow was heavy and made moving it a challenge. Gary C. Klein/USA TODAY NETWORK-

Beth Freund and Rachel sled down Garbage Hill as Josiah follows them. Sledding was popular in Oshkosh as school was canceled due to snow, Monday, April 16, 2018. Joe Sienkiewicz/USA TODAY NETWORK-Wisconsin

City of Sheboygan's Derek Munch moves his snow mover into position for a sidewalk along North 8th Street, Monday, April 16, 2018 in Sheboygan, Wis. Munch said that the snow was heavy and made moving it a challenge. Gary C. Klein/USA TODAY NETWORK-

City of Sheboygan's Derek Munch plows snow along an North 8th Street sidewalk while Jared Oliver, left, waits with a snow shovel to do cleanup, Monday, April 16, 2018 in Sheboygan, Wis. Munch said that the snow was heavy and made moving it a challenge. Oliver said, “Definitely the biggest dampest snow we’ve had yet.” Gary C. Klein/USA TODAY NETWORK-

Sheboygan County's Mark Larson blows snow near the Health and Human Services building, Monday, April 16, 2018 in Sheboygan, Wis. “This is going to take me a while to get around the block, its crazy,” said Larson. Gary C. Klein/USA TODAY NETWORK-

Claudia Martinez of Sheboygan shovels snow out of her home's driveway, Monday, April 16, 2018 in Sheboygan, Wis. “Yesterday we cleaned for more than three hours,” said Martinez.
Gary C. Klein/USA TODAY NETWORK-

Claudia Martinez of Sheboygan shovels snow out of her home's driveway, Monday, April 16, 2018 in Sheboygan, Wis. “Yesterday we cleaned for more than three hours,” said Martinez.
Gary C. Klein/USA TODAY NETWORK-

Lori Jore, of Appleton, works her snow blower through a large pile of snow at the end of her driveway Monday, April 16, 2018, in Appleton, Wis.
Danny Damiani/USA TODAY NETWORK-Wisconsin USA TODAY NETWORK-Wisconsin

Rob Riley, of Appleton, uses a shovel to break down a pile of snow before clearing it with his snowblower Monday, April 16, 2018, in Appleton, Wis.
Danny Damiani/USA TODAY NETWORK-Wisconsin USA TODAY NETWORK-Wisconsin

Chase Crees, 9, of Manitowoc, steers a toboggan full of his friends over a jump on the hill at Silver Creek Park Monday, Apr. 16, 2018, in Manitowoc, Wis. Children were given the day off of school after winter storm Evelyn brought a mess of snow to the area. Josh Clark/USA TODAY NETWORK-Wisconsin

A woman and a man snow shoe through Silver Creek Park after winter storm Evelyn dropped more than a foot of snow on the area Monday, Apr. 16, 2018, in Manitowoc, Wis. Josh Clark/USA TODAY NETWORK-Wisconsin

Icicles form at an angle on the eave of a garage after winter storm Evelyn brought 50 mile an hour winds and snow to the area Monday, Apr. 16, 2018, in Manitowoc, Wis. Josh Clark/USA TODAY NETWORK-Wisconsin

GREEN BAY - A spate of business and barn roof collapses have left residential property owners concerned about the two feet of snow on their own roofs.

Associated Builders and Contractors of Wisconsin Safety Manager Dan Parks has one piece of advice for homeowners thinking about climbing up there with a roof rake and a can-do attitude: Don't go there.

"Without any protection, I can't advise anyone to do it," Parks said. "Hire a professional if you're concerned, but don't go up there unless you know what you're doing and have taken adequate protections."

The weekend's record-setting storm may have passed, but its aftermath could pose problems, including more damage to roofs and flooding.

The weight of 24.2 inches of snow began to take its toll on commercial building roofs Sunday morning. In Ashwaubenon, the Econo Lodge roof collapsed Sunday morning, one of a half dozen roof collapses reported in Brown County Sunday.

Additional collapses have been reported in Brown, Oconto, Outagamie and Winnebago counties on Sunday and Monday.

Fire crews responded to a building collapse in the 2500 block of Lawrence Drive, in the town of Lawrence, just before noon Monday.

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Reports of roof collapses following a storm that dropped two feet of heavy snow have many people looking up - should you be worried?
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And the roofs of two barns in southwestern Brown County collapsed later in the day, at 1484 Mill Road and 7562 Holly-Mor Road, both in the town of Holland.

Meanwhile, the roof of a barn collapsed Monday morning in the town of Maine, according to Outagamie County Sheriff's Sgt. Alex Krueger. No one was injured but about 30 animals were reportedly trapped inside, he said. He did not have any additional information about the status of the animals Monday evening.

The Neenah Walmart, 1155 W. Winneconne Ave., remains closed until further notice because of structural concerns with the roof. The store closed late Sunday afternoon. Its Facebook page said the closure was “due to severe weather conditions affecting the safety of our customers and associates.”

“They’re working on it now,” said Tara Aston, Walmart’s senior manager of national media relations. “We don’t have a confirmed time of when they will reopen, but they are working on getting it reopened as soon as possible.”

And the Appleton Walmart at 3701 E. Calumet St. closed off a couple of areas in the store Monday as a precaution while snow was removed from the roof. The store remained open through the process.

In Oconto County, at O’Harrow Family Farm the roof collapsed on a barn that held 1,000 cows, said owner Tim O’Harrow.

“The center alley of the barn was destroyed,” he said. “We still have some cows underneath the debris. We got all the healthy cows out.”

O’Harrow said his Oconto Falls barn was not the only one that collapsed under the 29 inches of snow that fell in the county. He said he’d heard there were between five and 10 other barns with roof collapses.

“There’s a whole bunch of us that have suffered,” he said.

Not so fast, gardeners

The staff at Kimps Ace Hardware, like all of us, were ready for spring.

Jeff Baranczyk, hardware manager at the Howard hardware store, said shovels, snow throwers, snow melt and roof rakes had been warehoused to make room for garden supplies and the urge to get outdoors.

It's mid-April after all, right?

"We were getting set for spring and this is throwing things for a loop a little bit," Baranczyk said. "We’re doing the best we can with what we have in stock. Everyone was caught off guard by this one at this time of the year. Whatever we’ve got in stock, we’re going to get out."

The shovels, salt, roof rakes and snow throwers are all back in northeastern and central Wisconsin hardware stores after it became clear this weekend's record-setting storm was not some standard April shower.

After half a dozen reports of roof collapses in the Green Bay area on Sunday, Baranczyk said roof rakes have become a popular item – and one they have in stock.

Parks, ABC Wisconsin's safety director, advised residents looking to be proactive to ensure their downspouts and gutters are clear. He said the stress on residential roofs will be reduced as warmer temperatures begin to melt roof snow.

"It's going to melt anyway with the weather coming," Parks said.

Fox River, Green Bay flooding concerns

Green Bay Police Lt. Jody Buth said officers will continue to monitor water levels at the mouth of Green Bay this week. During the blizzard, the NWS declared a lakeshore flood warning along the bay out of concern heavy northeast winds would flood the bay with water and ice.

That warning has been lifted.

Now, Buth said, the focus is on monitoring the snow melt.

"We’re still on flood watch and we will be for the foreseeable future. They’re calling for warmer temperatures later this week, so I’m guessing water levels will rise up," Buth said. "We’re kind of preparing for the possibility for there being some flooding later this week."

National Weather Service Meteorologist Roy Eckberg said the heavy snow Friday night helped keep ice in place on the bay, allaying concerns that heavy northeast winds would push it into the Green Bay area. Still, he said, residents who live on Green Bay or the Fox River need to remain on guard for flooding into May.

"There's definitely an increased risk of river flooding," Eckberg said. "Water levels on the Fox River and lower bay will probably go up, but flooding, it's hard to say at this point."

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Here's what it looks like when two feet of snow falls on Green Bay.

Wait-and-see on the Wisconsin River

The late snowstorm this spring increases the chances for flooding along the Wisconsin River in central and north central Wisconsin, said Peter Hansen, vice president of the Wisconsin Valley Improvement Company, which monitors the Wisconsin River.

How much the snow will increase the risk of flooding won’t be known for a few days, Hansen said. Temperatures and rainfall will determine how fast the snow melts and the amount of flooding. The reservoirs were all at low levels Monday, Hansen said.

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Officials continue to monitor Wisconsin River water levels in the wake of a blizzard that blew through central and northeastern Wisconsin April 13-15.(Photo: Karen Madden/USA TODAY NETWORK-Wisconsin)

Wisconsin Valley Improvement Company staff is monitoring the situation and will keep a close eye on water levels as temperatures are predicted to get into the 40s and 50s at the end of the week, Hansen said. People who live near the river should always keep an eye on water levels and watch for any flood warnings, he said.

Now what?

Proactive steps you can take in the aftermath of the Blizzard of 2018.

Make sure your gutters and downspouts are clear so the melting snow can drain off your roof.

Keep any heating vents, plumbing vents, ducts and pipes coming out of your house clear. Water can seep in through them.

Avoid getting on metal roofs to shovel them. They can freeze up and become very slippery.

Make sure your sump pump is working and the drain is cleared.

If snow drifts are higher than your windows, watch window sills for signs water is seeping in.

Try to remove snow from around your house to reduce the use of your sump pump.